<div class='control-group {% if form_field.errors %}error{% endif %}'>
  {{form_field.label(class='control-label')}}
  <div class='controls'>
    {{form_field(class='span4', rows=8)}}
    {% for error in form_field.errors %}
      <span class='help-inline'>{{error}}</span>
    {% endfor %}
  </div>
</div>
